Chapter 12, Problem 12.25P

Assuming the earth’s surface is black, estimate its temperature if the sun has an equivalent blackbody temperature of $5800K$ . The diameters of the sun and earth are $1.39 {\text{x10}}^{9}and1.27{\text{x10}}^7$ , respectively, and the distance between the sun and earth is $\text{1}{\text{.5x10}}^{11}m$ .